Free feasibility study · King County

Know if your lot can hold an ADU — before you spend a dollar.

A written feasibility study of your property: zoning, critical areas, utilities and a plain-English verdict. Free — because we'd rather tell you "no" now than after you've paid for design. Sloped lot, small lot, wetlands nearby, "my neighbor was told no" — these are exactly the cases the study is for.

Get my free feasibility study What's in the study

Free · no obligation · a written verdict, not a sales call

Why it's free

You get the "no" for free — here's why we can afford that.

Some lots simply don't work — a steep slope, a critical area, a sewer run that quietly kills the budget. Many builders charge to find that out, or fold it into a design contract you've already signed. We check first, free, because we only make money building ADUs that actually pencil.

So if your lot doesn't work, you'll know — and it costs you nothing. If it does, you'll have a clear, written picture of what fits and what drives the cost before you spend a dime on design.

The welcoming covered entry of a finished modern backyard cottage at golden hour with warm porch light
What you get

What your free study covers.

A real written report on your property — not a sales brochure. Here's every part of it.

  • Site & project snapshotYour parcel, zone and lot size, pulled from county records.
  • Plain-terms summaryWhat it all means for your project, in English — no code-speak.
  • Zoning code checkSize, height, setbacks, lot coverage and parking for your city.
  • What fits on the lotThe realistic footprint and unit size your lot can actually hold.
  • Trees, easements & accessTree-retention rules, utility easements, and driveway, fire and construction access.
  • Critical-areas screenSlopes, wetlands, seismic, flood and shoreline — every King County GIS layer.
  • Utilities & connectionsSewer or septic, water and power — the real cost drivers, flagged early.
  • Permits & risk registerThe permit path and the specific things that could bite, listed out.
  • Next stepsExactly what to verify next, and what it would take to move forward.
Every conclusion is graded High / Medium / Low confidence, with how to verify it — and the verdict is never a bare yes or no. It's "appears feasible, subject to verification," with the exact list of what to confirm next.
How it works

Three steps, one minute to start.

  1. Send your address

    Use the form below — one minute, just your address and a phone number.

  2. We run the data

    We pull parcel data, county GIS critical-area layers and your city's ADU code.

  3. You get a written study

    A written verdict and a call to walk you through it, within a few business days.

A real study

What a real study looks like.

A feasibility study concept — a property lot outline with zoning setback and critical-area overlays
“Coverage is not the constraint here — access is.”
  • Lot: 0.37 acre
  • Two DADUs allowed
  • Critical areas: clear

That's the shape of a real study: your lot run against the zoning code and every King County GIS critical-area layer, ending in a plain-English verdict and the exact list of what to verify next. Get the same study for your lot — free.

Get the same study for my lot →
Straight talk

What a desktop study can't do — and why it's still the right first step.

A desktop study isn't a survey, an engineering design or a permit approval. It won't stamp a foundation or guarantee a number to the dollar. What it does is tell you whether it's worth paying for those things at all — before you spend anything on them.

That's not a weakness. It's the honest first step: real answers about your lot, fast and free, so the money you spend later goes into a project that can actually get built.

Questions

The questions everyone asks about "free".

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Still have questions?

Talk to an ADU builder

No pressure — clear answers about your lot and what the study covers.

Get my free feasibility study → (425) 394-8849
Is the ADU feasibility study really free?
Yes — free, always. We check your lot against zoning, setbacks, critical areas and utilities and send you a written verdict, and it costs you nothing. We can afford to because we only make money building ADUs that actually pencil, so we'd rather tell you no now than after you've paid for design.
Do you visit the property for the study?
The free study is a desktop review first — we run your parcel data, the county GIS critical-area layers and your city's ADU code, so you get answers fast without waiting on a site visit. A physical survey and site verification come later, in pre-construction, only once you decide to move forward.
What if my lot fails the study?
Then you've saved yourself from paying for a design that could never be built — and you keep the study, at no charge. Some lots simply don't work: steep slopes, wetlands, or a sewer run that kills the budget. Knowing that up front is exactly what the free study is for.
Which cities and counties do you cover?
King County and the Eastside — Bellevue, Seattle, Kirkland, Redmond, Renton, Sammamish, Kent and nearby. Send your address and the study confirms whether we cover it and what your city allows.
What happens after the study?
If your lot works and you want to move forward, the next step is our design-and-permitting package — one flat fee for a standard detached ADU. There's no obligation: plenty of people take the free study and sit on it until they're ready.
Start here

Get your free feasibility study.

Send your address and we'll run the study — a written verdict on what fits, what drives the cost, and what could bite. And if the answer is "don't build," we'll tell you straight.

  • Free desktop feasibility study
  • A written verdict, graded by confidence
  • We reply within one business day
  • Prefer to talk? (425) 394-8849

Get your free feasibility study

Send your address — we'll check your lot and reply within one business day.

Free · no obligation · your address is used only for the study. See our Privacy Policy.

Get my free feasibility